feat(crashlytics): add firebase.json support for NDK crash reporting

[MichaelVerdon]

Description

closes #8784

Related issues

Release Summary

Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
  • Yes
• My change supports the following platforms;
  • Android
  • iOS
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• This is a breaking change;
  • Yes
  • No

Test Plan

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Project	Deployment	Preview	Comments	Updated (UTC)
react-native-firebase	Ready	Preview	Comment	Dec 9, 2025 0:37am

[mikehardy]

I believe this will be a little more involved than the current state of the PR. A couple things:

1- the initial issue was about adding configuration support to optionally enable GWP-ASan support, this PR does not address that at all
2- this PR does add configuration support to optionally enable NDK support, but does so incompletely

For item 1 - GWP-ASan support, the configured AndroidManifest item is this one https://developer.android.com/ndk/guides/gwp-asan#opt-in and assuming we can configure it using the manifest placeholder style I suggest having it be a string value in firebase.json with 'default' as the default value (since that's what it is if not specified - our current state) but never and always as possible other values. That would actually close the bug and warrant the closes #nnnn tag in the PR description

For item 2 - NDK symbol upload is a real need for developers as well but is distinct from the logged issue. Simply enabling it isn't so bad, it's a similar placeholder but is in addition to the current one - https://firebase.google.com/docs/crashlytics/android/get-started-ndk#add-extension

That is half the job with regard to config, but the second half will take most of the work - you have to configure automatic symbol uploading.

Auto upload is trickier though because it is linked to gradle's internal + dynamic model of the build variants for an app, which are app-specific and may be customized (e.g., playRelease, fdroidRelease or premiumRelease, liteRelease if you have build flavors for different app modes vs the more common release). So there needs to be some gradle logic that hooks the gradle build post-config to detect all variant names with case insensitive release in the name, and add the upload as a finalizes dependency to the build for those variants

If it is not feasible to get all the release variants of an app (it should be, but may be difficult, and in fact the variants API in gradle just changed so it is particularly annoying...) an attempt to simply hard-code the release variant and pull it from config directly in a try/catch with a warning if it failed could be a first attempt

And the task to hook after the build of the release type(s) is then https://firebase.google.com/docs/crashlytics/android/get-started-ndk#set-up-automatic-native-symbols-upload

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